"Now that Linux is the most popular free Unix-like operating system, it shouldn't be a surprise that some projects have begun treating non-Linux operating systems as second-class citizens. This isn't out of contempt for the BSDs or OpenSolaris, it's just a matter of limited manpower: if almost all the users of the application have a Linux operating system and if all the core developers are using Linux themselves, it's difficult to keep supporting other operating systems. But sometimes the choice to leave out support for other operating systems is explicitly made, e.g. when the developers want to implement some innovative features that require functionality that is (at least for now) only available in the Linux kernel."

The true is, i'm not developer at all. I'm just trying to put myself in this role. I see myself as someone who want to make software. What can be reason for that, money, girls, parties etc. ;-) Well, if i would do coding for fun, then still, i would do it for myself, so i do not car about other operating systems. If i make it for community, then i would have to define what it is "my community". So it may be the user group, that like same thing that i do. For example, if i liek Linux, then this will be my community. But then, why should i care other OSs? And where is the onnovation vs portability then, and why should i care about it, i do it for fun!

And one more point, Red Hat did nice open source business, so open source do not mean making software only for fun and express myself. It may also mean money